I have seen aftermarket powdercoated products, such as off-road bumpers/skid plates/rocker sliders for jeeps, that almost disintegrate from rust when the surface gets a chip. It is like the powder coat retains surface integrity, but the underlying metal rusts faster under the surface until large slabs of power coat flake away. I am not sure if this is a normal or abnormal issue, but I am beginning to question powder coating for applications where rock chips, etc may allow a corrosion start. Any other experiences like this??